Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / rtpenc_h261.c
... / ...
CommitLineData
1/*
2 * RTP packetization for H.261 video (RFC 4587)
3 * Copyright (c) 2014 Thomas Volkert <thomas@homer-conferencing.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "avformat.h"
23#include "rtpenc.h"
24
25void ff_rtp_send_h261(AVFormatContext *s1, const uint8_t *frame_buf, int frame_size)
26{
27 RTPMuxContext *rtp_ctx = s1->priv_data;
28 int processed_frame_size;
29 int last_packet_of_frame;
30 uint8_t *tmp_buf_ptr;
31
32 /* use the default 90 KHz time stamp */
33 rtp_ctx->timestamp = rtp_ctx->cur_timestamp;
34
35 /* continue as long as not all frame data is processed */
36 while (frame_size > 0) {
37 tmp_buf_ptr = rtp_ctx->buf;
38 *tmp_buf_ptr++ = 1; /* V=1 */
39 *tmp_buf_ptr++ = 0;
40 *tmp_buf_ptr++ = 0;
41 *tmp_buf_ptr++ = 0;
42
43 processed_frame_size = FFMIN(rtp_ctx->max_payload_size - 4, frame_size);
44
45 //XXX: parse the h.261 bitstream and improve frame splitting here
46
47 last_packet_of_frame = (processed_frame_size == frame_size);
48
49 memcpy(tmp_buf_ptr, frame_buf, processed_frame_size);
50 tmp_buf_ptr += processed_frame_size;
51
52 ff_rtp_send_data(s1, rtp_ctx->buf, tmp_buf_ptr - rtp_ctx->buf, last_packet_of_frame);
53
54 frame_buf += processed_frame_size;
55 frame_size -= processed_frame_size;
56 }
57}